<template>
  <div class="login_container">
    <div class="login_box">
      <!--  登录头像    -->
      <div class="avator_box">
        <img src="../assets/logo.png" alt="">
      </div>
      <!--  登录表单    -->
      <el-form :model="loginForm" :rules="loginFormRules" ref="loginFormRef" label-width="0px" class="login_form">
        <el-form-item prop="username">
          <el-input prefix-icon="el-icon-user" v-model="loginForm.username" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input prefix-icon="el-icon-lock" v-model="loginForm.password" placeholder="请输入密码 "
                    show-password></el-input>
        </el-form-item>
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

<script>
export default {
  name: "login",
  data() {
    return {
      //这是登录表单的数据绑定对象
      loginForm: {
        username: 'admin',
        password: '123456'
      },
      loginFormRules: {
        username: [
          {required: true, message: '请输入用户名', trigger: 'blur'},
          {min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur'}
        ],
        password: [
          {required: true, message: '请输入密码', trigger: 'blur'},
          {min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur'}
        ]
      }
    }
  },
  methods: {
    resetLoginForm() {
      //resetFields  重置
      this.$refs.loginFormRef.resetFields();
    },
    login() {
      //validate 对整个表单进行校验的方法，参数为一个回调函数
      this.$refs.loginFormRef.validate(async (valid) => {
        if (!valid) {
          return;
        }
        const res = await this.$http.post("login", this.loginForm)
        console.log(res);
        if (res.data.meta.status !== 200) return this.$message.error("登录失败")
        this.$message.success("登录成功")
        //1、登录成功后，将token保存到sessionstorage中  sessionstoreage与localstoreage区别
        window.sessionStorage.setItem("token", res.data.data.token)
        //2、通过编程式导航跳转到后台主页，路由地址是 /home
        this.$router.push('/home')
      })
    }
  }
}
</script>

<style scoped>
.login_container {
  background-color: #3b4b6b;
  height: 100%;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;

  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}

.avator_box {
  height: 130px;
  width: 130px;
  border: 1px solid #eeeeee;
  border-radius: 50%;
  padding: 10px;
  box-shadow: 0 0 10px #dddddd;

  position: absolute;
  left: 50%;
  transform: translate(-50%, -50%);
  background-color: #fff;
}

.avator_box img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: #eeeeee;
}

.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 0px 20px;
  box-sizing: border-box;
}

.btns {
  display: flex;
  justify-content: flex-end;
}
</style>